docs: def get_value(self,
                    entry_name: Text,
                    entry_lines: Sequence[Text]) -> Optional[Text]:
          """See base class method."""
          # Search through all lines and return the first matching one
          for line in entry_lines:
              match = self._regex.match(line)
              if match:
                  return match.group(1)
          # nothing matched
          return None